Great product!!By Bosleyon 3/15/2013

Bosley would recommend this product to a friend

I have this running on my aquarium and it is spot on and fail proof . the back up plunger has not been activated Probably because the top off system works so efficient, Great product recommend to anyone who is tired of adjusting or just having other systems that fail.

Not Cheap..you get what you pay forBy Curtison 3/10/2013

Curtis would recommend this product to a friend

Best ATO available

Love It!!!By Troyon 3/2/2013

Troy would recommend this product to a friend

You get what you pay for, and this ATO is awesome!!! Easy to setup and fail safe. Great quality.

Serious about reefing? Get this!By Chrison 2/27/2013

Chris would recommend this product to a friend

One of the smartest purchases I've made. Expensive but made with quality and plenty of mounting options. Highly recommend!

Worth the InvestmentBy JOHN on 2/24/2013

JOHN would recommend this product to a friend

I was a little apprehensive about spending this kind of money on an ATO. From the moment I opened the box I recognized the quality. Works perfect, provides piece of mind, and everything you need is included. Previously bought JBJ but was disappointed due to lack of redundancy. This should be fail proof with dual sensor/float valve.

Tunze ATOBy Toby Flendersonon 2/23/2013

Toby Flenderson would recommend this product to a friend

Pros: works perfectly, precisely, the German way.
Cons: hard to fight off all the ladies who want to get there hands on my tunze.

best topoff out thereBy chrison 2/18/2013

chris would recommend this product to a friend

This topoff is the best there is. I replaced my jbj with this and am so glad I did. The optical sensor with a float is pretty much fail safe and my water level stays the same.

Love it!By Joeon 2/13/2013

Joe would recommend this product to a friend

I've never had an ATO system, but this unit is awesome! I had no problems setting it up. Sure, the instructions MIGHT be lacking a little, but I don't feel the complaints below are justified.

The main sensor monitors the water level and activates the pump. The other one can be used as a safety shutoff/alarm OR as an alert that your ATO reservoir is empty.

It's your choice!! I, personally, set it up in the latter form and the product works great.

TerribleBy Pissedreeferon 2/1/2013

Pissedreefer wouldn't recommend this product to a friend

This product sucks end of story

Perfect!By Calvinon 1/15/2013

Calvin would recommend this product to a friend

after lugging around water for a few months i decided to get this along with a large storage container to relieve myself of water duties every morning. works great ! only have to top off the container once a week !

Once it's going it's great!By Terrieon 1/11/2013

Terrie would recommend this product to a friend

I have to come back and review again only b/c I gave it a 3 getting frustrated with the set up. The instructions are more for someone familiar with ATO's..not me.. this is my very 1st one. I finally found a forum 3reef that someone had posted full details with pics and was able to get mine going. Had I had any knowledge at all about what I was doing this would have been a 5 minute setup! Now I know, it's done, wow it's simple!!

It is not even letting and 1/8 of the water out before it tops it off... This I like!!! I pray for longevity for this price :)

???By Terrieon 1/10/2013

Terrie would recommend this product to a friend

I have to say I can't even give this item a rating yet. I received it a couple days ago and looked at it, put it back in the box and read the instructions. I took it out again and my head is spinning. Again today I took it out and my head is spinning. I'm trying to see the dark picture examples, I've read and read the instructions 10 times. For someone who has NEVER had an ATO of any type I chose this b/c of the good ratings and being BRS recommended. I figured I'd just spend the $ the first time instead of being someone who went less inexpensive and regretted it. However, like I said I've NEVER had an ATO of any type.... THIS THING NEEDS REAL INSTRUCTIONS FOR INSTALLATION!! I don't know what the parts are called so reading the long drawn out instructions isn't helping, the pics are too dark, and I can't find anything on the web!